Motor mechanism.



Patented Sept. II, 1900.

G. A. BRACHHAUSEN.

MOTOR MECHANISM. (Application flied June 7, 1900.)

2 Sheets$heet (No Model.)

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No. 657,756. Patented Sept. ll, I900. G. A. BRACHHAUSEN.

MOTOR MECHANISM.

(Application filed June 7, 1900,) (No Model.) 2 Sheets8heet 2-.

me NoRms PETERS covv PHOTO UTMO WASHIN 1 I UNITED STATES GUSTAV A. BRAGHHAUSEN,

PATENT OFFICE;

OF RAHWAY, NEXV JERSEY.

MOTOR MECHANISM.

SPECIFICATION forming part of Letters Patent No. 657,756. dated September 1 1, 1900.

Original application filed April 4, 1900, Serial No. 11.415.

To all whom it may concern.-

Be it known that l, GUSTAV A. BRACH- HAUSEN, a citizen of the United States, residing at Rahway, Union county, State of New Jersey, have invented certain new and useful Improvements in Motor Mechanism, of which the following is a specification.

My present invention relates to motor mechanism, and more particularly to spring-motors for musical and like instruments.

Considerable dificulty has been experienced heretofore in musical instruments and other devices by reason of the fact that the sudden release of the parts of the motor mechanism usually resulted in injuring the entire instrument. I

The object of my invention is to overcome these difficulties and to provide a motor mechanism wherein no injurious results to the entire device are liable to follow the sudden release of the partssuch, for instance, as that which follows from breaking the mainspring of the motor or some of the teeth of the connecting-gears.

To these ends my invention consistsin the novel arrangement and combination of parts to be hereinafter described and claimed.

In the accompanying drawings, Figure 1 represents a rear view of sufficient number of parts of a mechanical musical instrument to illustrate my invention. Fig. 2 is a fragmentary enlarged detail view of a portion of the structure to be hereinafter more fully described. Fig. 3 is a side view of the springdrum of the motor. Fig. 4. is an end view of the same looking in the direction of the arrow in Fig. 1.

l designates the framing of the instrument in which the various parts are mounted. To this framing is secured a casting 2, which constitutes a bearing for various portions of the device. A spindle 3 projects from the casting,and upon this spindle rotates a springdrum 4. The spring-drum 4 is provided with a driving-gear 5 and a cam-plate 6. The

with a pinion 8. engage an internal gear 9.

Divided and this application tiled June '7. 1900. Serial No. trio model.)

this internal gear 9 is formed as a ratchetwheel 10, and a suitable locking-pawl (not shown) is provided to engage the ratchetwheel to prevent a backward movement thereof. The combined internal gear and ratchet-Wheel 9 10 is connected to the inner end of the spring inany suitable manner, so that a rotation of the winding-post 7 will cause the spring to be wound. The camplate 6 is provided wit-h cams or indentures 11 12 in the periphery thereof for transmitting motion to various portions of the instru= ment. Thus the cam 11 codperates with an antifriction-roller 13, carried by an arm 14, which is secured to a rockshaft 15. This rock-shaft is likewise provided with one or more arms 16, which transmit longitudinal motion to a rod 17 through the intermediate abutment 18. The shaft 15 is likewise provided with a crank-arm 1.9, that is adapted to transmit motion to portions of the instrument upon an oscillation of the shaft 15 in the manner described.

For a thorough understanding of the present invention it is unnecessary to enter into details as to the various operations produced by the movement of the parts hereinbefore described, it being sufficient that it be under stood that the cam-plate 6 transmits motion to various port-ions of the device. The driving-gear 5 is connected up with a train of gear to the governor in the usual or any ordinary manner and which needs no illustration for a thorough understanding of the present invention.

Reference being had to Figs. 2, 3, and 4 of the drawings, itwill be observed that the driving-gear 5 and the cam-plate 6 are movably connected to the spring-dru m t-that is to say,the ca m-plate and gearare made in separate pieces from the drum and are united thereto, so as to be capable of attaining a partial rotation independently of the springdrum 4:. In the present instance I have provided inclined pins or projections 20 upon the gear or driving wheel 5. The pins or projections 20 project into undercut elongated grooves 21, formed in the drum, as indicated at the upper right-hand portion of Fi 3 of the drawings. The length of each of the grooves 21 is considerably greater than the pins or projections are thick, so as to permit a free movement or backlash of the gear With relation to the drum. By inclining the pins in the manner stated the gear cannot be removed from the drum, but merely has a slight rotary movement independent thereof. The cam-piece 6 is connected with the drum in substantially the same manner as the gearwheel 5. Thus the cam-piece is made of a separate piece from the drum and carries projections or pins 22, which are inclined and project into undercut elongated recesses 28, formed in the drum. The length of these recesses is such as to permit a free movement of the pins 22 therein, so that a free movement or backlash of the parts with relation to each other may be provided in case the spring of the drum is broken. The backlash of these parts prevents injury to the device as a Whole in case of a sudden releasing of the parts.

It will be understood that in operation motion is communicated to various portions of the device through the gear 5 and the campla'te 6 when the motor is in operation and that a sudden releasing of the parts by a breaking of the spring in the drum 4 or by damage to the teeth of any of the gear-Wheels will permit-a backlash of the spring-drum 4t and cam-plate 6 and gear 5 with relation to each other, so as to preventinjury to the entire device.

It is thought from the foregoing description that a clear understanding of the invention can be arrived at without a further detail description of the construction and operation of the device.

The subject-matter of the present application is a division of my application, Serial No. 11,415, filed April 4:, 1900, for automatic me chanical musical instruments.

Having described my invention, what I claim, and desire to secure by Letters Patent, lS

1. In a spring-motor, the combination of a spring-drum, hand-operated means for winding the spring of said drum and retaining it against backward movement and a drivinggear operatively connected thereto to rotate therewith, said driving-gear being rotatable with said drum in one direction but capable of movement independently of said drum in an opposite direction.

2. In a spring-motor, the combination of a spring-drum, handoperated means for Winding the spring of said drum and retaining it against backward movement, a driving-gear adapted to rotate with said drum in one direction to effect a movement of the movable parts and a pin-and-slot connection between said drum and gear to permit an independent movement of said drum and gear with relation to each other in an opposite direc tion.

3. In a spring-motor, the combination of a spring-drum, hand-operated means for winding the spring of said drum and retaining it against backward movement, a driving-gear adapted to rotate therewith to effect a movement of the movable parts of the instrument, inclined pins or projections extending from said gear and cooperating with undercut grooves in the drum into which said pins project to prevent the gear from being removed from the drum but to permit an independent movement of the drum and gear with relation to each other.

4. In a spring-motor, the combination of a spring-drum, hand-operated means for winding the spring of said drum and retaining it against backward movement, a driving-gear adapted to rotate with said drum in one direction to effect a movement of the movable parts of the instrument, inclined pins or projections extending from said gear and coop erating with undercut grooves in the drum into which grooves said pins project to prevent the gear from being removed from the drum but to permit an independent movement of the drum and gear with relation to each other, a cam-plate adapted to rotate with the drum to effect a movement of the movable parts, inclined pins or projections carried by said cam-plate, undercut grooves in the drum and into which grooves the pins on the cam-plate are adapted to project to prevent the cam-plate from being removed from the drum but to cause said drum and camplate to move together in one direction but to permit an independent movement of the drum and cam-plate with relation to each other in an opposite direction.

5. In a spring-motor, the combination of a spring-drum, hand-operatedmeans for wind ing said drum and a driving-gear and a camplate operatively connected to rotate with the drum in one direction, said driving-gear and cam-plate being capable of movement independently of said drum in an opposite direction.

6. In a spring-motor, the combination of a spring-drum hand-operated means for Winding said drum,a driving-gear adapted to rotate with said drum in one direction to effect a movement of the movable parts, a cam-plate and pin-and-slot connection between said drum and gear and between the drum and cam-plate to permit an independent move- 

